<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>在线尝试 Bootstrap 实例</title>
    <meta name="viewport" content="width=device-width,
                                     initial-scale=1.0,
                                     maximum-scale=1.0,
                                     user-scalable=no">

    <link rel="stylesheet" href="css/bootstrap.css">
    <script src="js/jquery-3.2.1.js"></script>
    <script src="js/bootstrap.js"></script>
</head>
<body>
<div class="container">



    <div style="padding: 100px 100px 10px;">
        <form class="bs-example bs-example-form" role="form">
            <div class="row">
                <div class="col-lg-6">
                    <div class="input-group">
                        <div class="input-group-btn">
                            <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
                                下拉菜单
                                <span class="caret"></span>
                            </button>
                            <ul class="dropdown-menu">
                                <li><a href="#">功能</a></li>
                                <li><a href="#">另一个功能</a></li>
                                <li><a href="#">其他</a></li>
                                <li class="divider"></li>
                                <li><a href="#">分离的链接</a></li>
                            </ul>
                        </div><!-- /btn-group -->
                        <input type="text" class="form-control">
                    </div><!-- /input-group -->
                </div><!-- /.col-lg-6 --><br>
                <div class="col-lg-6">
                    <div class="input-group">
                        <input type="text" class="form-control">
                        <div class="input-group-btn">
                            <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
                                下拉菜单
                                <span class="caret"></span>
                            </button>
                            <ul class="dropdown-menu pull-right">
                                <li><a href="#">功能</a></li>
                                <li><a href="#">另一个功能</a></li>
                                <li><a href="#">其他</a></li>
                                <li class="divider"></li>
                                <li><a href="#">分离的链接</a></li>
                            </ul>
                        </div><!-- /btn-group -->
                    </div><!-- /input-group -->
                </div><!-- /.col-lg-6 -->
            </div><!-- /.row -->
        </form>
    </div>




</div>
</body>
</html>